What do you think about it? If you or your fiends don’t buy any bitcoin, what is the reason?
I want to focus on the main question that you asked!
There are more than one reason for people not buying or investing into bitcoin:
1.
Legal framework - Many people would argue me on this, but I believe this is the main roadblock for people not to buy or invest into bitcoin. A majority of the mass is a law abiding citizens. They would not want to do anything financially which doesn't go well with the current legislative framework. A majority of the countries have not yet recognized bitcoin or any other crypto as a legal tender and they don't have any specific legal framework for it. That's why these class of people thinks it is illegal. Since these class of people don't want to engage in any confusing financial matter, they would not want to buy or invest into bitcoin.
2.
Lack of technical knowledge - It is another bottleneck for many people not to accept or buy bitcoin. In majority of the Asian/African/South American countries, people are not knowledgeable about the internet banking system. They still prefer to go to the bank branch to fulfill their banking needs. They just simply don't want to learn the new things. They are mainly old age people who are sitting on a considerable amount of wealth. But due to their fear of learning new things, they would never show interest in learning about bitcoin because it is hard for them to digest the process of sending or receiving money using cryptos.
3. Banking and government propaganda - Banks are using this weapon to effectively discourage people from investing into cryptos. I often receive such emails from my bank stating that cryptocurrency is not a legal tender. That is true because my country specifically said so. But when you receive such information directly from your banks, it makes you believe that using crypto is a punishable offence, which discourages people from using it.
I believe these three are the major bottlenecks in 2019 which is making a lot of us uncomfortable in using bitcoin or cryptos. You are welcome if you would like to add few more points.
I disagree with your second point about Lack of technical knowledge. I have no knowledge about how Gold ore is mined nor do I have technical knowledge about refining the ore to get gold. Only thing I know is Gold is appreciated by the masses and my investment in gold will always have some value.
I have written about my hardship faced while explaining my village farmers about bitcoin please read my post
https://bitcointalksearch.org/topic/an-introduction-to-our-lime-initiative-5098721.
The main problem of any cryptocurrency is that the community expect everyone to be a software engineer or technology expert. Now my village farmers don't know what is internet but they have a bitcoin paper wallet. They can't even read it but know its valve.